Drilldown: Patents

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Patents > Office: Other & Publication date: 1918 & Supplementary to patent: None

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None (5) · Floris Albert van Heyst (3) · Heinrich Bier (3) · Nicolaas Everhard Groeneveld Meyer (2)
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Tech fields:
airplane (12) · Frame (9) · construction (6) · design (6) · subsystem (6) · wings (4) · instrument (4) · propellers (4) · military (4) · aerodynamics (3) · propulsion (3) · control (3) · flapping (3) · airship (3) · whole (3)
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Showing below up to 41 results in range #1 to #41.

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